(this element does not have any stable isotopes)
Atomic weight of the most stable isotope: 289.19042(60) u
| Isotope | Atomic weight/u | Half-life |
| 284 | [284] | 2.5 ms +18-8 |
| 285 | 285.18364(47) | 0.15 s +14-5 |
| 286 | 286.18423(71) | 0.16 s +7-3 |
| 287 | 287.18678(66) | 0.51 s +18-10 |
| 288 | 288.18757(91) | 0.52 s +22-13 |
| 289 | 289.19042(60) | 0.97 s +97-32 |
Units: y = year, d = day, h = hour, m = minute, s = second, ms = millisecond, µs = microsecond.
Numbers in italics are uncertainties with the same unit as the last digit of the half-life.
Atomic weights were obtained from NIST Database 144
The half-life of radioactive isotopes was obtained from the Nuclear Wallet Cards
The Atomic Line List does not contain any data for this element
(Atomic Line List v3.00b5)
